Users can develop flexibly according to the serial baud rate, equipment name, pairing password.

Features

• BT Version: Bluetooth Specification V4.0 & BLE
• UART send and receive max bytes is 512
• Other device to module in SPP mode: 90 Bytes per packet
• Other device to module in BLE mode: 20 Bytes per packet
• Two data transmission mode, balance mode and high speed mode
• Working frequency: 2.4GHz ISM band
• Modulation method: GFSK(Gaussian Frequency Shift Keying)
• RF Power: -23dbm, -6dbm, 0dbm, 6dbm.
• Speed: Asynchronous: 3K Bytes
• Synchronous: 3K Bytes
• Security: Authentication and encryption
• Service: Slave SPP, Peripheral BLE, UUID FFE0,FFE1
• Power: +3.3/+5.0VDC 50mA
• Long range: SPP 30 meters, BLE 60 meters
• Power: SPP 13.5mA, BLE 9.5mA
• Working temperature:–5 ~ +65 Centigrade

• K2: While connected, pressing K2 more than 100ms will disconnect.  While in sleep mode, pressing K2 will restore factory settings.
• U1: U1 is the wireless module, It includes automatic power on reset circuit.
• D1: Slowly Flashing == Sleeping; Continuous lit == connected.
• J1: The standard Grove connector.

Please visit Seeed Studios wiki page for more info about this product.